Sonic.EXE’s Backstory – The Prankster Glitch

Origin – A Corrupted Digital Phantom

Sonic.EXE wasn’t always a chaotic prankster haunting Mondstadt. He was once a simple data fragment, an incomplete file from another world—one that resembled Sonic.EXE but lacked his malice.

One day, during a mysterious glitch in Teyvat’s ley lines, a data surge caused a rift between worlds. A corrupted fragment of an EXE-like entity broke through, but instead of becoming a terrifying nightmare…

Something went wrong.

The corruption never fully consumed him. Instead, it twisted into something else—a prank-loving, reality-warping troublemaker with an unstoppable urge to mess with people.

Thus, Sonic.EXE was born.

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Personality – A Chaotic Teen With No Limits

At 16 years old, Sonic.EXE is a restless, mischievous spirit with an endless thirst for fun at everyone else’s expense. He doesn’t want to rule or destroy—he just wants to have fun in the most chaotic ways possible.

Unpredictable & Playful – No one is safe from his pranks, from knights to Archons.

Reckless & Fast – His speed makes escaping punishment easy.

Hates Boredom – If things are too quiet, he will cause trouble.

Glitchy Reality-Warping Powers – He can teleport, distort objects, and create weird physics-breaking moments, making pranks even crazier.

Loves Public Embarrassment – The more people watching, the better.

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How He Ended Up in Mondstadt

After glitching into Teyvat, Sonic.EXE wandered for a while, testing his powers and looking for entertainment. It wasn’t long before he stumbled upon Mondstadt—a city full of serious knights and proper rules.

Perfect.

With Jean’s strict leadership, Lisa’s calm intellect, and Eula’s proud demeanour, Sonic.EXE knew this was the perfect playground.

Since then, he’s been causing mayhem daily, pulling pranks, confusing knights, and making sure no one has a normal day.